Improvement in hollow bricks



cum I extent GEORGE 'H. JOHNSON, OF NEW YORK,

Letters Patent No. 110,764, dated January 3, 187 1.

IMPROVEMENT IN -HOLLOW BRICKS.

The Schedule referred to in these Letters Patent and making part of the name.

I, Gaonon H. J onssox, of the city, county, and State of New York, have invented an Improved llollow Tile or Brick, of which the following is a spccilication.

My invention relates to an im n'orcmentin the-form I and construction of hollow g piadrilatcral tiles or bricks, produced by dropping down the emls ot' the hollow tile or brick between the sides thereof, until the upper edges of the ends shall be an inch or two belowfthc upper edges of the sides, and lower edges of said ends shall project an equal distance below the lower edges of the sides, thus forming projecting tongues or tcnonsat each end of the tile on one side or face thereof, and counterpart recesses at eaclrcnd on the opposite side or i'ace, so that when any two. of these tiles'are laid directly one upon the other in a proper manner, the

- tongues of the one will closely fit into the counterpart recesses in the other, and thus form a lock-joint between them.

Scmicircnlar recesses are formed in each end of the end-pieces, so that when the end-pieces are brought together in laying up the bricks, a cylindrical hole is left through them, forming air-passages conm'mnicat ing with the hollow spaces within the tiles. r

The sides -of the tile are made to project slightly beyond tlrc ends thereof, leaving a margin to be chipped,

olt' when desired, in fitting the tiles to form a circle or other irregular line.

In the aceompa-nying drawing- Figure 1 is a plan view of my improved hollow tile. Figure 2, an end view thereof, with dotted lines illustrating the manner in which two or.morc are fitted together.

Figure 3, a central vertical section in the line a: :c of fig. 1.

l -igure 4,a view, partly in section, illustrating the manner oi'laying up the tiles, either directly one upon the other in straight-vertical joints or otherwise, so as to break joints in horizontal courses; and alsd the combination of a horizontal tic-rod therewith.

A is my improved hollow tile or brick, molded oi clay or other suitable material, and consisting of the sides a, a and ends b I), inclbsing a central hollow space, 0.

Instead of forming the ends I) of the tilc'eveuand ilush with the extremiticsof the sides'as in ordinary hollow bricks, the sides aa are made to project slightly beyond the; ends 7 b (I, as seen. at y, lig. 3, and these ends are madeto project about an inch and a half,"

illustrated in fig. 4.,

Where it is desired to break joints in laying a course of tiles, the projecting ends from one tile pass into. the central hollow space oi'that below it, (see lig. 4;) otherwise each projection lits into the recess above the end o'fthe tile below it, and rests therein, (sec I v also fig. 4,) and in eithcrcase acloselockomt is made between the tile above and below. u

l claim as my invention- The improved hollow brick or tile herein shown, composed of theequal rectangular sides a (a and the ends I) b, when said parts are disposed, with relation to each other, in the manner and ior't-hcpurposc herein set forth.

\Vitness n'iy hand to this spcoilicationthis 17 th day 7 of Ma y, 1570.

GHQ. 1L JOHNSON.

Witnesses:

luv) A. Dunn, .16 mm .Jonxson. 

